YoungForest's blog

A weekly review of substring matching, move-to-front permutations, trie-based entity parsing and three-column colouring DP, with notes on tool choice.

A biweekly review of largest digit-sum groups, palindrome construction, circle-rectangle overlap and a sorted suffix-sum greedy choice of dishes.

Weekly notes on greedy subsequences, binary reduction, diverse strings and stone-game DP, alongside a long-awaited rating recovery.

Weekly notes on lucky frequencies, rising and falling teams, transit-time design and valid-string counting under practice-group pressure.

A biweekly review of array-distance search, cinema-seat bitmaps, memoized integer power values and circular DP for non-adjacent pizza slices.

A weekly review of indexed insertion, four-divisor filtering, street-grid connectivity and the longest matching prefix and suffix.

A four-problem contest recap covering greedy house allocation, plate-stack DP, binary search on workout gaps, and trie-based grouping.

A three-round server-development interview covering system design, CS fundamentals, algorithms, smart pointers, and leaderboard architecture.

Weekly notes on lucky matrix values, range-increment stacks, balanced search trees and team performance during a family visit.

A detailed review of a Tencent WeChat backend internship interview, including process and technical questions.